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Integrating 1D and 2D hydrodynamic, sediment transport model for dam-break flow using finite volume method

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Abstract

The purpose of this study is to set up a dynamically linked 1D and 2D hydrodynamic and sediment transport models for dam break flow. The 1D-2D coupling model solves the generalized shallow water equations, the non-equilibrium sediment transport and bed change equations in a coupled fashion using an explicit finite volume method. It considers interactions among transient flow, strong sediment transport and rapid bed change by including bed change and variable flow density in the flow continuity and momentum equations. An unstructured Quadtree rectangular grid with local refinement is used in the 2D model. The intercell flux is computed by the HLL approximate Riemann solver with shock captured capability for computing the dry-to-wet interface for all models. The effects of pressure and gravity are included in source term in this coupling model which can simplify the computation and eliminate numerical imbalance between source and flux terms. The developed model has been tested against experimental and real-life case of dam-break flow over fix bed and movable bed. The results are compared with analytical solution and measured data with good agreement. The simulation results demonstrate that the coupling model is capable of calculating the flow, erosion and deposition for dam break flows in complicated natural domains.

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Authors and Affiliations

  1. School of Ocean Science and Environment, Dalian Ocean University, Dalian, 116023, China

    MingLiang Zhang, YuanYuan Xu, ZiNing Hao & Yang Qiao

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  1. MingLiang Zhang
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  2. YuanYuan Xu
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  3. ZiNing Hao
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  4. Yang Qiao
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Correspondence to MingLiang Zhang.

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Zhang, M., Xu, Y., Hao, Z. et al. Integrating 1D and 2D hydrodynamic, sediment transport model for dam-break flow using finite volume method. Sci. China Phys. Mech. Astron. 57, 774–783 (2014). https://doi.org/10.1007/s11433-013-5294-z

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  • DOI: https://doi.org/10.1007/s11433-013-5294-z

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